Muffler



Nov. 11,1930. 0. w. EISELE MUFFLER Filed Oct. 5, 1927 CMHLES Wi /31w ATTORNE V 1Q noise of the escaping Patented Nov. 11, 1930 umrsosTATEsPATE OFFICE CHARLES W. EISELE, DETROIT, MICHIGAN, ASSIGNOR TOCHRYSLER CORPORATION,

OF HIGHLAND PARK, MICHIGAN, A CORPORATION OF DELAWARE' MUFFLERApplication filed October 5, 1927. Serial No. 224,064.

My invention relates to new and useful improvements in'the constructionof a muflier for theexhaust gases of an internal combustion engine ofthe type used in automotive 5 vehicles.

An important object of my invention is to provide a muflier in whichtheexhaust gases may pass directly thru the muffler or may be divertedthru chambers which deaden the gases. From this point of view theinvention consists in a novel and simple construction of a muflier, inthe peculiar arrangement and combination of parts, and in certaindetails of construction as will be more fully hereinafter set forth.

Another object of the invention is to simplify the construction andprovide an inexpensive muffler which deadens the noise as well asprovides an improved rigid con struction.

Other objects and advantages will more fully appear from the followingdescription takenin connection with the accompanying drawings in which:

view thru my improved muflier.

Fig. 2.is a sectional view on line 22 of Fig. 1.

Fig. 3 is a sectional view on line 33 of t Fig. 1. I 1

Referring to the drawings, the reference numeral 10 designates anannular outer shell formed from a flat sheet metal stamping with "itslateral edges joined together as at 12. The opposite ends of the shell10 are closed by cup shaped stampings 14 and 16, each being providedwith an outwardly turned flange18 which is secured to the shell 10 as bywelding. The end portions 14 and 16 are each provided with flanges asfor the reception of conduits, the one illustrated as the exhaust pipe22 thru which the exhaust gases are conducted to the muflier and theother the tail pipe24 thru which the exhaust gases are conducted fromthe mufiler. I have shown a sleeve 26 between the flanges 20 and thepipes 22 and 24 to provide further strengthening of the connection atthis point.

The portion of the muflier between the end portions has been formed intofour cham- Figsl is a longitudinal partially sectional.

bers, namely; a rear end chamber 28, an upper chamber 30, lower chamber32 and a central chamber 34. The end chamber'28 is-formed by a radialpartition 36, which like the end members is-formed cup shaped andprovided with a flange 38 which receives a sleeve 40 forming acommunication between the end chamber 28 and the inner chamber 34.

The upper and lower chambers 30-and 32 are formed by a pair ofpartitions 42 extending longitudinally from the end 14 to the partition36. The partitions are each formed from a piece of sheet metal, having asemicylindric i channel extending longigitudinally thereof, centrallylocated. The outer edges or the partitions are bent in the directionof'the channels to form flanges 46 which are secured to the shell 10 asby welding. The two partitions are placed together in such a manner thatthe channels 44 form the chamber 34. The oppositeends of the chamber 34are in. communication with the exhaust pipe 22 and the sleeve 40respectively. The lower channel is provided with a plurality ofapertures 48 at the end opposite the exhaust pipe. The apertures 48 forma communication between the chambers 34 and 32 and the apertures 50 forma communicaion between the chambers 32 and 30; the partition 36 beingstamped out as at 52 to form a communication between the chambers 30 and28.

F A valve .54, controlled by the lever 56, has been provided in thesleeve 40 so that the chambers 30 and 32 may be cut 013? and the exhaustgas permitted to pass from the exhaust pipe 22 directly to the chamber28 and ,tail pipe 24 thru the chamber 34, when the baflie at varyingdistances thereby deadenwardly, reducing the area of the lower chamber32 at the end where its gases are expelled thus providing a continuousexpansion passage from the chamber 34 to the tailpipe 24.

The mufiier is inexpensive to manufacture as its parts are few andformed from sheet metal stampings. The parts have been so arranged thatthe assembly is rigid, it being supported radially by the end walls andthe partition 36, and longitudinally by the partitions 42.

It will be understood that various changes in the construction andarrangement of parts may be made without departing from the spirit of myinvention, and it is not my intention to limit the scope of my inventionother than by the terms of the appended claims.

What I claim is:

1. A mufiier of the class described comprising an outer shell, end wallsadapted to close the opposite ends of said shell, a partition extendinglongitudinally of said shell adapted to form a pair of chambers each onthe opposite sides of said partition, said partition being formedby apair of stampings, each having a struck out portion forming a centralchamber extending longitudinally between the stampings of saidpartition, an

, inlet passage comuncating with one end of said central chamber, acommunication between the opposite end of said central chamber and oneend of one of the chambers formed by said partition, a communicationbetween the opposite end of said last named chamber and the other ofsaid chambers formed by said partition, and an outlet passagecommunicating with said last named chamber.

2. A mufli'er of the class described comprising an outer shell, endwalls adapted to close the opposite ends of said shell, a two partpartition extending longitudinally of said shell forming a centralchamber between said partition and a pair of chambers at the oppositesides of said partition, said partition having one of its parts providedwith openings at one end to form a communication between the centralchamber and one of the chambers at opposite sides of said partition, andhaving openings thru both parts of said partition -to form acommunication between both chambers at the opposite sides of saidpartition, and means for conducting exhaust gases thru said mufiierfirst in one direction thru the central chamber, thru another chamber inthe opposite direction and thru the other chamber in a direction to thatof the central chamber.

3. A muflier of theclass described comprising an outer annular shell,end walls fitting the inner periphery of said shell, a pair said shellwith its opposite end off center and forming a pair of outer taperedchambers on opposite sides of said partition, means for permittingexhaust gases to enter said central chamber, thence pass thru saidchamber to the small end of one of the outer chambers, thru the lastnamed chamber and to the smaller end of the other of said outer chambersand out the opposite end of said chamber.

4. A mufiler of the class described comrising a cylindrical shell, endwalls at the opposite ends of said shell having an inlet and an outletopening respectively, a radially projecting partition adjacent one endof said shell forming a small and a large chamber, a longitudinallyextending partition in the formed therein forming an upper and a lowerchamber, said central chamber having one end positioned to receive theexhaust gases and its opposite end provided with openings to form acommunication between said central chamber and said lower chamber, saidlongitudinal partition being provided with openings to form acommunication between said upper and lower chambers, said radialpartition being provided with an opening to form a communication betweensaid upper and small chambers, a 'sleeve forming a communication betweensaid central chamber and said small chamber, and a valve in said sleevefor directing the exhaust gases thru all'of said chambers when closedand for permitting direct communication between said central chamber andsaid small chamber when said valve is closed. a

5. A muflier of the class described comprising an outer shell, apartition in said shell forming a pair of chambers, said partition beingprovided with a plurality of openings at one end of the chambers forminga communication from one .chamber to the other, and a diagonallypositioned baflie plate adjacent said openings to intercept and divertexhaust gases at an angle to the flow of the gases through saidopenings, the distancefrom each of said openings to said baflle platebeing difierent 6. In a mufller, the combination of a partiings formi acommunication from one chamber to t e other, and a baflle in front ofsaid openings to intercept and divert ex-' haust gases at an angle tothe flow of the gases throu h said openings, the distance rom each 0said openings to said baflie bein diflerent.

In a muflier, the combination of an outer shell, end walls for saidshell, a cylindrical partition extending longitudinally of the mufiierand at an angle to the axis of said mufller, and lateral flanges on saidcylindrical partition having their outer edges in engagement with theinner periphery of said shell forming a .pair of chambers, saidcylindrical partition and said flanges bein provided with openings for(permitting ex aust gases to enter the cylin rical partition and thechambers formed by the lateral flan es.

CHARLES W. EI ELE.

